django-model: Limit choice to only staff members to select as problem setter for a problem
django-model: Limit choice to only staff members to select as problem setter for a problem

CRUx-BPHC/crux-judge,basu96/crux-judge,basu96/crux-judge,CRUx-BPHC/crux-judge,basu96/crux-judge,CRUx-BPHC/crux-judge,basu96/crux-judge,basu96/crux-judge